Injangwe nimbwa nyinshi zinshuti ntizirera kuva zikiri nto, kuburyo zishaka kumenya imyaka yabo? Nukurya ibiryo by'inyana n'ibibwana? Cyangwa kurya ibiryo by'imbwa n'injangwe? Nubwo wagura itungo kuva ukiri muto, uracyibaza imyaka itungo rifite, ni amezi 2 cyangwa amezi 3? Mubitaro, mubisanzwe dukoresha amenyo kugirango tumenye mbere yimyaka amatungo.

Amenyo afite itandukaniro rikomeye bitewe nibiryo barya nuburyo bwabo bwo kugaburira, hamwe nubunini bw amenyo asya ibikinisho hamwe nibiryo byakoreshejwe. Kubwibyo, muri rusange, usanga ari ukuri kubibwana ninjangwe, mugihe kubwa mbwa zikuze, gutandukana birashobora kuba ingirakamaro. Birumvikana ko ibyo bita gutandukana nabyo biringaniye. Birasanzwe ko imbwa yimyaka 5 kurya amagufa kandi ifite amenyo yambara kandi ashwanyaguza kimwe nimbwa yimyaka 10, ariko ntushobora guhura nimbwa yimyaka 10 ifite amenyo ameze nkayo imbwa y'imyaka 5. Nigeze guhura na nyiri amatungo yazanye itungo ryumusatsi wa zahabu uvuga ko afite imyaka 17. Icyo cyari ikintu gikomeye, kandi byari ngombwa kumenya imyaka yacyo nubuzima bwumubiri kugirango bivurwe. Afungura umunwa kugirango abone amenyo, byagereranijwe ko yari afite imyaka 7 gusa. Nibutse imyaka ya basogokuru itariyo?

Birumvikana ko kwitegereza amenyo mugihe cyubwana birashobora kandi kwerekana indwara nyinshi zinyamanswa, nko kubura calcium hamwe namenyo abiri. Ni ngombwa rero kwiga uburyo bwo kureba iterambere ry amenyo, kumenya imyaka nubuzima.

Imbwa zitangira gukura amenyo yimeza kuva muminsi 19 kugeza 20 nyuma yo kuvuka; Mugihe cibyumweru 4-5, ibice byambere nubwa kabiri byamabere afite uburebure bungana (incisors); Mugihe cibyumweru 5-6 byamavuko, iryinyo rya gatatu ryo gukata rifite uburebure bungana; Kubibwana byibyumweru 8, ibibyimba byose byamabere birakura byuzuye, kandi amenyo yamabere yera kandi yoroheje kandi atyaye;

Mu mezi 2-4 nyuma yo kuvuka, imbwa zigenda zisimbuza amenyo yazo amababi, kumeneka no gukura ibishishwa bishya kuva kumutwe wa mbere; Guhera kumyaka 5-6 y'amezi, gusimbuza inciseri ya kabiri n'iya gatatu na kineine; Ku mezi 8-12, molars zose zisimbuzwa amenyo ahoraho (amenyo ahoraho). Amenyo ahoraho yera kandi arabengerana, kandi incisors zerekanaga ibibyimba. Niba umuhondo ugaragara, byerekana tartar;

Iyo imbwa ifite imyaka 1.5 kugeza kuri 2, impinga nini ya mbere ya manibular incisor (iryinyo ryimbere) irashira kandi igatwarwa nimpinga nto, bita impinga ishaje; Ku myaka 2.5, impinga ya kabiri ya mandibular incisor (iryinyo ryo hagati) irashaje; Ku myaka 3,5, impinga yimisemburo ya maxillary irashaje; Ku myaka 4.5, impinga yinyo yo hagati ya mexillary irashaje; Imyaka y'ubwangavu yimbwa irangiye, kandi impinduka zinyo muri iki gihe ntabwo ziterwa ningaruka zimyaka nkibyo kurya barya, bityo bigenda buhoro buhoro.

Guhera kumyaka 5, incisor ya gatatu hamwe na kine kumutwe wuruhanga rwo hasi byambarwa gake (ntibisibanganye), naho ibice bya mbere nubwa kabiri bifite urukiramende; Ku myaka 6, impinga ya incisor ya gatatu ya maxillary yambarwa gato, kandi amenyo ya kineine arahuzagurika; Ku myaka 7, imashini ya mandibular yimbwa nini yambarwa kumuzi, hamwe na elliptique ndende; Ku myaka 8, imbwa nini ya mandibular incisors yambarwa kandi igana imbere; Ku myaka 10, hejuru yimyambarire ya mandibular ya kabiri ya incisor na maxillary incisor ni ndende ya elliptique; Imbwa nini muri rusange zifite igihe cyimyaka 10-12 kandi ni gake zigira amenyo, akenshi biterwa no kwambara cyane;

Ku myaka 16, imbwa nto ifite igihe kirekire cyo kubaho, cyangwa se imbwa isanzwe ishaje ifite ibisebe byabuze, amenyo ya kineine ituzuye, hamwe n amenyo yumuhondo akunze kugaragara; Ku myaka 20, amenyo ya kine yaguye kandi nta menyo yari hafi mu cyuho cyo mu kanwa. Kurya byari ibiryo byamazi.

Ugereranije n'imbwa akenshi zinyoza amenyo kubintu bikomeye, bigatuma bigorana kumenya imyaka kubera kwambara amenyo, amenyo y'injangwe akura buri gihe kandi birashobora gukoreshwa nkigipimo cyiza cyo gusuzuma imyaka.

Amenyo yinini yinjangwe ni maremare, akomeye kandi atyaye, afite umuzi nisonga. Iyo umunwa wo mu kanwa ufunze, amenyo yo hejuru ya canine aba ari kuruhande rwinyuma yinyuma yinyo yo hepfo. Hariho icyuho inyuma y amenyo ya kine, arirwo rwimbere. Premolar yambere ni ntoya, iyambere ya premolar nini, naho premolar ya gatatu nini nini. Byombi hejuru na hepfo premolars ifite inama enye zinyo, hamwe ninyo yinyo yo hagati iba nini kandi ityaye, ishobora gutanyagura inyama. Kubwibyo, byitwa kandi iryinyo ryacitse.